Stefan Maderwald1, Stephan Orzada2, 3, Lars Haering4, Andreas Czylwik4, Thomas Schlosser3, Mark E. Ladd1, 3, Kai Nassenstein, 23
1Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen , Essen, Germany; 2Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany; 3Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany; 4Department of Communication Systems, University Duisburg-Essen, Essen, Germany
In this study an in-house developed phonocardiogram (PCG) gating device was used to validate the diagnostic accuracy of acoustic triggered sequences in a clinical routine protocol at 1.5T. PCG- and ECG-gated cine imaging sequences for the assessment of LV global and regional function as well as velocity-encoded phase-contrast imaging sequences for flow quantification were compared. 147 consecutive patients were enrolled and evaluated. PCG-gated imaging was successful in 95%, ECG-gated in 100% of all patients. With cine imaging an excellent correlation between PCG and ECG was observed, whereas flow quantification measurements showed a wide limit of agreement for all variables analyzed.